The angle of incidence of a light beam onto a reflecting surface is continuously varied. The reflected ray is found to be completely polarized when the angle of incidence is `60^(@)`. What is the index of refraction of the reflecting material ?

Options

A. `(sqrt3)/(2)`
B. `(2)/(sqrt3)`
C. `sqrt3`
D. `2`

Answer

C

Explanation

This occurs when the angle of incidence is equal to the Brewster angle: `tan theta_(beta) = mu`